CC3200: How to change network(ssid and password) in program cc3200 ?

but still it is connecting to old network only

Hi

#include <WiFi.h>

WiFiUDP Udp;
int status = WL_IDLE_STATUS;
unsigned int localPort = 2390; // local port to listen on
char ssid_old[] = "PAYNET1" ; // default network name also called SSID
char password_old[] = "9886468697@insemi";
char ssid_new[] = "amol";
char password_new[] = "9665413788";

void setup() {

Serial.begin(115200);
Serial.print("Attempting to connect to Default Network named: ");
Serial.println(ssid_old);
WiFi.begin(ssid_old, password_old); // attempt to connect default network name specified
delay(1000);

while ( WiFi.status() != WL_CONNECTED) // loop run until wifi get connected to specified network
{
Serial.print(".");
delay(300);
}

Serial.println("\nYou're connected to the network");
Serial.println("Waiting for an ip address");

while (WiFi.localIP() == INADDR_NONE) // loop run until to get ip address of current network
{
Serial.print(".");
delay(300);
}

Serial.println("\nIP Address obtained");
printWifiStatus();
WiFi.disconnect();
delay(10000);

// Trying to change network

Serial.print("Attempting to connect to Default Network named: ");
Serial.println(ssid_new);
WiFi.begin(ssid_new, password_new); // attempt to connect default network name specified
delay(1000);
while ( WiFi.status() != WL_CONNECTED) // loop run until wifi get connected to specified network
{
Serial.print(".");
delay(300);
}

Serial.println("\nYou're connected to the network");

while (WiFi.localIP() == INADDR_NONE) // loop run until to get ip address of current network
{
Serial.print(".");
delay(300);
}

Serial.println("\nIP Address obtained");
printWifiStatus(); // call function to print current wifi status

}

void loop() {
// put your main code here, to run repeatedly:

}


void printWifiStatus()
{
Serial.print("\n**************** WIFI STATUS **************\n");
Serial.print("SSID: ");
Serial.println(WiFi.SSID()); // print the SSID of the network you're attached to


IPAddress ip = WiFi.localIP(); // print your WiFi IP address
Serial.print("IP Address: ");
Serial.println(ip);

long rssi = WiFi.RSSI(); // print the received signal strength:
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}


this code example i am trying .